Fundamentals of the Nervous System

NERVOUS SYSTEM: master ________ and _____________ system?

NERVOUS SYSTEM: 3 overlapping functions?

2 divisions of of the nervous system?

CNS: what does it include? _________ and _________ center? Where are most cell bodies found?

PNS: where is it located? Where do nerves extend from? What types of nerves are included? What is ganglia?

NERVOUS TISSUE: how are cell described?

NERVOUS TISSUE: 2 main cell types? Describe them?

THE NEURON: what is it? What does it conduct and where? Action ________?

THE NEURON: other characteristics. They have? Do not? What do fetal neurons lose?
What type of metabolic rate do they have? What does that require? Neurons die after how many minutes?

STRUCTURAL CLASSIFICATION OF NEURONS: multipolar. How many processes? How many dendrites? How many axons? What types of neurons are the majority of these?

STRUCTURAL CLASSIFICATION OF NEURONS: bipolar. How many processes? Is it rare or not? Found in what senses?

STRUCTURAL CLASSIFICATION OF NEURONS: unipolar. How many processes? How do they start? What senses are unipolar?

FUNCTIONAL CLASSES OF NEURONS: interneurons. Always found where? What does it mean to say they are "integrative"? What percentage of neurons fall in this category? What type of -polar are they?

FUNCTIONAL CLASSES OF NEURONS: motor (efferent). Where do they end (terminate)? What -polar are they?

SUPPORTING CELLS: how many types? how many in CNS and PNS? What does it provide? What does it cover?

NEUROGLIA: nicknames (2)? Have _________ ____________ and a central _________ _________? What percentage of the mass of the brain?

SUPPORTING CELLS: NEUROGLIA IN CNS. Astrocytes. How abundant are they? What do they help with? Responsible for what?

SUPPORTING CELLS: NEUROGLIA IN CNS. Microglia. How abundant? What does it engulf? Removes? Cell are found? Acts as?

SUPPORTING CELLS: NEUROGLIA IN CNS. Ependymal. Circulate what? Makes what from blood plasma? What does it line?

SUPPORTING CELLS: NEUROGLIA IN CNS. Oligodendrocytes. Wrap around what? Produce what? How many cells to how many axons?

SUPPORTING CELLS: NEUROGLIA IN PNS. Satellite Cells. Surround what? Thought to give cells bodies what? Thought to eliminate what? Keep cell bodies from what?

SUPPORTING CELLS: NEUROGLIA IN PNS. Schwann Cells. Surround what? Form what around axons of PNS. How many axons? How many schwann cells?

MYELIN SHEATHS: what types of structures? Composed of? Surround what? Forming what? Prevents action potential from?

MYELIN SHEATH: functions. Prevents leakage of? Increases the speed of?

NERVES OF SPINAL CORD: ________-________ organs in the PNS? How many axons? What are they wrapped in? Surrounded by what type of cells?

REFLEX ARCS: _______ ________ of neurons? Explain reflexes? Can be what or what?